Borrowings and Other Financing Instruments (Tables)

6 Months Ended

Jun. 30, 2012

Borrowings and Other Financing Instruments [Abstract]

Commercial Paper

The following table presents commercial paper outstanding for NSP-Wisconsin:

(Amounts in Millions, Except Interest Rates)	Three Months Ended June 30, 2012			Twelve Months Ended Dec. 31, 2011
Borrowing limit	$	150		$	150
Amount outstanding at period end		79			66
Average amount outstanding		69			24
Maximum amount outstanding		147			70
Weighted average interest rate, computed on a daily basis		0.40	%		0.37	%
Weighted average interest rate at period end		0.40			0.46

Committed Credit Facilities Available

At June 30, 2012, NSP-Wisconsin had the following committed credit facility available (in millions of dollars):

Credit Facility		Drawn (a)		Available
$	150.0	$	79.0	$	71.0

Other Short-Term Borrowings

The following table presents the notes payable of Clearwater Investments, Inc., a NSP-Wisconsin subsidiary, to Xcel Energy Inc.:

(Amounts in Millions, Except Interest Rates)	June 30, 2012			Dec. 31, 2011
Notes payable to affiliates	$	0.6		$	0.5
Weighted average interest rate		0.34	%		0.46	%